BATTERY

Disclosed is a battery, the battery including a housing, where the housing is a metal piece, the housing includes a bottom shell and a cap, and the cap covers an opening of the bottom shell; the cap includes a mounting hole, a conductive sealing pin disposed in the mounting hole, a side periphery of the sealing pin is provided with a clamping groove, and the cap close to the mounting hole extends into the clamping groove and is in clamped connection to the clamping groove; and a seal is provided at a connection between the clamping groove and the cap, and the seal is an electrical insulator. The structure improves application stability of the battery and improves sealing performance and safety of the battery.